Yeah your math is way off.
We already knew/know the starting point of 61 and 65 and their applicable ranges and private keys.
61 is in the 61 bit range.
A 1 followed by 15 zeros thru a 1 followed by 15 f’s
65 is in the 65 bit range.
A 1 followed by 16 zeros thru a 1 followed by 16 f’s.
For 66:
The starting range is a 2 followed by 16 zeros
The ending range is a 3 followed by 16 f’s
20000000000000000-3ffffffffffffffff
from my guess its weeks if not a few months till 66 is solved my guess is its key is in the ranges of and thats at a 90% probability rate. now back to the guy who wanted to conjoin if we could get multipule people to run each range id bet itd be a matter od days till its cracxked depending on everyones computer specs and how long you comfortable with running. with the right code id bet my first two numbers in privkey are no greater than 35 logistically 36 and no smaller than at a like 0.00000000000000000001 ect chamce min is 0x1a274a956a7d53d977 which i dont think will be anywere close to that..
3b320044788A17DA0 - 3BC0ABFC3654BAE80
3475FBD690F7B3880 - 34B85C9495BA98840
30389466D233BCDE0 - 305E58789566D2EA0
2E1325EAAC24E8A40 - 2E6917C76BF8F5340
#67 would be
76650288f113CE0C0 - 778157F86CA914280
67EBF7AD21EF67100 - 69cb0874000C96B00
60020C853D2F282C0 - 60BCB0F12ACD13580
5C264BD668493ECC0 - 455DB0955BB3E3100
once 66 is cracked id delete a row from the list for 67 and its be a completely different